# lines and angles

Views:

Category: Education

## Presentation Description

No description available.

## Presentation Transcript

### Slide 1:

6/30/2010 1 Lines And Angles Made By- Maitreya Patni 9785796957 Jaipur

### Index :

6/30/2010 2 Index Important Terms Types Of Angles

### Important Terms :

6/30/2010 3 Important Terms Ray- Ray is a part of line that has one endpoint and goes on endlessly in the other direction. Line Segment- A part of line that has two endpoints is known as line segment.

### Slide 4:

6/30/2010 4 Line- A series of point that go endlessly in both directions is known as a line. Parallel Lines- Two lines that are equal distance apart and will never intersect are known as parallel lines.

### Slide 5:

6/30/2010 5 Perpendicular Lines- Two lines that intersect to form four right angles are known as perpendicular lines.

### Slide 6:

6/30/2010 6 Angle- The figure formed when two rays share the same endpoints. Vertex- The point at which two rays join together to form an angle is known as vertex.

### Types Of Angles :

6/30/2010 7 Types Of Angles Obtuse Angle- An angle that measures more then 90° is known as obtuse angle.

### Slide 8:

6/30/2010 8 Acute Angle- An angle that measures less then 90° is known as acute angle. Right Angle- An angle that measures 90° is known as right angle.

### Slide 9:

6/30/2010 9 Straight Angle- An angle that measures 180° is known as straight angle. Reflex Angle- An angle that is greater then 180° is known as reflex angle.

### More Angles :

6/30/2010 10 More Angles Adjacent Angles- Adjacent angles are angles which have a common side and a common vertex but no interior points in common.

### Slide 11:

6/30/2010 11 Vertically Opposite Angles- Vertically Opposite Angles are the angles opposite to each other when two lines cross.

### Slide 12:

6/30/2010 12 Corresponding Angles- When two lines are crossed by another line the angles in matching corners are called corresponding angles. x y

### Slide 13:

6/30/2010 13 Alternate Interior Angles- When two lines are crossed by another line the pairs of angles on opposite sides of the transversal but inside the two lines are called Alternate Interior Angles. a b

### Slide 14:

6/30/2010 14 Alternate Exterior Angles- When two lines are crossed by another line the pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles. c d

6/30/2010 15